Q. State true or false: Snapshot isolation prevents lost updates

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Q. Which of the following is a variant of snapshot isolation

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Q. Under ________ the system uses locking mechanism that applies only to updates

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Q. The situation in which each pair of transactions has read a data written by the other, but there is no data written by the transactions is called as _______

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Q. Oracle uses __________ for the serializable isolation level

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Q. State true or false: Snapshot isolation has low overhead

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Q. In ________ no two aborts occur unless two concurrent transactions update the same data item.

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Q. Which of the following transactions can multiversion two phase locking protocol not differentiate.

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Q. ________ deletes a data item from a database

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Q. Which of the following does not lock the entire index

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Q. Which of the following is included in the operational mechanism of the index locking protocol?

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Q. _________ is a form of two degree consistency designed for programs that iterate over tuples of a relation by using cursors.

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Q. Transactions that involve user interactions are called __________

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Q. State true or false: Key value locking provides increased concurrency

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Q. To prevent the phantom phenomenon, _______ is used

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Q. Which of the following does cursor stability ensure

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Q. State true or false: Exclusive locks are held until transaction commit in degree two consistency

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Q. In order to maintain transactional integrity and database consistency, what technology does a DBMS deploy?

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Q. Which of the following are introduced to reduce the overheads caused by the log-based recovery?

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Q. Which of the following protocols ensures conflict serializability and safety from deadlocks?

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